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W KIDDER Gas Regulator.

'Patented oct. 12, 1852.

UNTT BT TES WALTER KIDDER, OF LOWELL, MASSACHUSETTS.

GAS-REGULATOR.

To all whom it may concern:

Be it lmown that' I, VALTER KIDDER, of Lowell, in the county of Middlesex and State of Massachusetts, have invented a new and Improved Gas-Regulator; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawing, making part of this specication.

The case of my improved gas regulator contains two chambers A, B, communicating with each other, the chamber B, being situated above the chamber A. The pipe from the street mainis connected at a, with the chamber A, and the pipe, which supplies the burner, or burners, is connected, at b, with the same chamber. A valve-seat c, lits up against the shoulder in the case, at the bottom of the chamber A, and is held securely in that position by the piece a, which is screwed into the case, and presses up against said valve-seat. An arm e, is attached to said valve-seat, and projects into the chamber A. Upon the extremity of this arm, as a -fulcrum, is poised a lever f, to one arm of which is attached a valve d, which plays over the orifice in the valve-seat c; and to the other arm, by a hinged joint, a rod g, is affixed, extending upward in the center of the chamber B. A tubular projection Z, rises up, a short distance, from the bottom of, and concentric with the chamber B, and forms an annular space z', between it and the outer case. An air-tight inverted cup C, is attached to the center rod g,and extends down within the space i, nearly to its bottom. Said space is partially filled with some suitable liquid, which forms a packing for preventing the escape of gas from the chamber A, to the chamber B. usually employ mercury for this purpose, because it is not liable to freeze or waste away by evaporation. A cover 7L, is usually placed over the against the valve CZ, whose surface is comparatively small, while the pressure of the gas above said valve acts upon the top of said valve and on the under side of the bottomof the cup C, whose area is several times greater than that of the valve al. Hence, with an equal-armed lever f, a very slight pressure of gas above the valve (Z, will counterbalance a comparatively great pressure in the main below the valve. A little too great a pressure of gas in the branch pipe, will slightly elevate the inverted cup and partially close the induction valve; and a deficiency of gas in the branch pipe, will cause the inverted cup to descend and open a larger orifice around the induction valve for the entrance of gas from the st-reet main to supply the deficiency, and thus preserve a uniform pressure in the branch pipe.

My above described regulator is especially intended for single burners, such as for street lights &c.; and therefore only a very small induction orifice is required; so that the variations in the pressure of gas in the main will scarcely affect the pressure above the valve d. The object of its use is to produce a proper and uniform pressure of gas in the branch pipe which supplies the burner or burners. Its exceeding simplicity and cheapness, together with its very small size, render it very desirable for single burners, as for a very small supply pipe.

Having thus fully described my improved gas regulator, what I claim therein as new and desire to secure by Letters Patent, is-

Producing a uniform pressure of gas in the branch pipe which supplies the burners,

by means of the inverted cup C, the vibratory lever f, and the induction valve (Z, arranged and operating within the chamber A, of the branch pipe, substantially as herein represented and described.

The above specification of my improved apparatus for regulating the iow of gas from the main to the burners, signed this 21st day of June 1852.

WALTER KIDDER.

Witnesses:

J. C. ABBOTT, T. FLEE'rwooD, R. CrroncHmL. 

